High-speed amorphous permanent magnet motor pipe-through stator water cooling device and use method thereof

Abstract

The application belongs to the field of motor thermal management and cooling technology, and particularly relates to a high-speed amorphous permanent magnet motor through-pipe type stator water cooling device and a use method thereof, which comprises a stator core, a through-pipe structure arranged at a stator yoke part, a plurality of cooling pipes arranged in the through-pipe structure, an end rotary connecting section for connecting the cooling pipes, and a water inlet and a water outlet; the circumferential direction of the through-pipe structure is located at a yoke part area of a stator tooth part; the radial direction of the through-pipe structure is located at a radial middle area of the stator yoke part; the main body of the through-pipe structure adopts the cooling pipes, and the number and pipe diameter of the cooling pipes are determined according to the comprehensive constraints of the cooling heat exchange area, the flow resistance and the effective magnetic conduction cross-sectional area of the yoke part; the plurality of cooling pipes are connected by a flow channel connection mode of series and parallel combination to form the through-pipe structure; the water inlet and the water outlet are arranged side by side at the same end surface of the motor; and the rotary connecting section at the end is provided with a deflection section in the radial direction.

Description

Technical Field

[0001] This invention belongs to the field of motor thermal management and cooling technology, specifically relating to a tube-type stator water cooling device for a high-speed amorphous permanent magnet motor and its usage method. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] Currently, electric motors are ubiquitous, and their types and styles have become increasingly diverse depending on their applications. With the widespread use of high-speed permanent magnet motors in aerospace, high-speed compressors, flywheel energy storage, precision manufacturing, and other fields, the demand for high power density, high efficiency, and high reliability is constantly increasing.

[0004] When high-speed permanent magnet motors operate at high speeds and frequencies, the high copper losses in the stator windings and the high iron core losses lead to a sharp increase in internal heat load. If the heat dissipation path is too long or the cooling efficiency is insufficient, it can easily cause the winding hot spot temperature to exceed the limit, reduce the insulation life, or even cause demagnetization. Amorphous alloy materials have the advantage of low iron loss and are suitable for the stator core of high-speed permanent magnet motors, but under high heat load conditions, an efficient cooling structure is still required to quickly dissipate heat.

[0005] Traditional water jacket or external surface cooling methods for motor housings suffer from long heat transfer paths and limited effectiveness in controlling hot spots in the windings. Therefore, improvements or innovative designs are needed for stator water-cooling structures that balance electromagnetic and cooling performance.

[0006] Amorphous alloys are ideal for high-speed permanent magnet motor stator cores due to their extremely low iron loss. However, amorphous alloys have low thermal conductivity and are sensitive to mechanical stress and local magnetic saturation. Traditional water-cooling structures, such as water jacket cooling of the casing, have cooling media located far from the stator windings and the main heat source areas of the core, resulting in long heat transfer paths and limited hotspot control capabilities.

[0007] Existing technologies can employ a stator water-cooling structure for hub motors, making heat dissipation more uniform, avoiding axial temperature gradients, improving heat dissipation efficiency, and effectively solving the problem of motor temperature rise. High-energy-density permanent magnet motor water-cooling systems can be used to directly cool the main heat-generating components of the motor, such as the windings and core, greatly improving heat dissipation efficiency. Due to the simple cooling water channels and fewer bends, the flow resistance of the cooling water is significantly reduced, the water pump pressure is lowered, the uniformity of the motor's temperature distribution is significantly improved, the heat dissipation capacity is greatly enhanced, and the torque density of the motor is increased.

[0008] Existing technology can employ a liquid-cooled flat-plate linear permanent magnet synchronous motor, with the cooling device located inside the primary core yoke of the linear motor. The arrangement of the cooling pipes is completely different from that of existing similar cooling pipes, using an alternating arrangement of inlet and outlet pipes. This improves cooling capacity and thrust density, effectively reduces the temperature difference between the front and rear ends of the motor, and brings the local temperature of each part of the armature core towards equilibrium. This reduces the thermal resistance between the winding and the core, achieving the technical effect of reducing winding copper loss and improving motor efficiency.

[0009] In summary, existing technologies all place cooling pipes in the stator yoke. The unreasonable design of the cooling pipe location can easily cause local magnetic saturation in the stator yoke, increase iron loss, and degrade electromagnetic performance.

[0010] Furthermore, existing pipe-type structures mostly employ fully serial flow channels, resulting in large pressure drops, uneven flow distribution, low cooling efficiency, and large space occupation at the end, which is not conducive to the compact integration of high-speed motors. There is an urgent need to develop a new type of stator water-cooling device that can efficiently dissipate heat from the stator windings and core while also considering electromagnetic performance, flow resistance, and structural compactness. Summary of the Invention

[0011] To address the aforementioned issues, this invention proposes a tube-type stator water-cooling device for high-speed amorphous permanent magnet motors and its application method. It addresses the problems of high temperature rise in the stator windings and stator core during high-speed operation, long heat transfer paths in traditional water-jacket cooling systems, insufficient control of hot spots in the windings, and the potential for localized magnetic saturation and increased iron losses when cooling pipes are arranged in the stator yoke. By coordinating the design of the tube placement, cooling pipe parameters, and flow channel connection methods in the stator yoke under electromagnetic performance constraints, the cooling medium is positioned closer to the main heat source areas of the stator, shortening the heat transfer path. This achieves coordinated suppression of temperature rise in multiple key components, including the stator windings, stator teeth, and stator yoke, while ensuring the motor's electromagnetic performance, thereby improving the continuous operational reliability of the high-speed amorphous permanent magnet motor.

[0012] According to some embodiments, the first aspect of the present invention provides a tube-type stator water-cooling device for a high-speed amorphous permanent magnet motor, which adopts the following technical solution: A high-speed amorphous permanent magnet motor stator water cooling device with through-tube type includes a stator core, a through-tube structure disposed in the stator yoke, a plurality of cooling pipes disposed in the through-tube structure, an end rotary connection section for connecting the cooling pipes, and an inlet and an outlet connected to the cooling pipes. The circumferential direction of the tube structure is located in the yoke region of the stator teeth, which is used to reduce the risk of local magnetic saturation of the yoke caused by the tube structure above the stator slot, so as to make the magnetic flux density distribution of the stator yoke uniform and reduce the adverse effects of the tube structure on electromagnetic performance; the radial direction of the tube structure is located in the radial middle region of the stator yoke, so as to shorten the heat conduction path of the stator yoke to the cooling water, forming an efficient heat transfer path of "yoke - tube wall - water inside the tube"; The main body of the through-pipe structure adopts cooling pipes. The number and diameter of the cooling pipes are determined based on the comprehensive constraints of cooling heat exchange area, flow resistance and effective magnetic cross-sectional area of ​​the yoke. The number of cooling pipes is 12-48, and the outer diameter of the cooling pipes is 8-12mm, so as to obtain better heat exchange capacity under controllable pressure drop and take into account the iron loss level. Several cooling pipes are connected in series and parallel to form a through-pipe structure. The main body of the cooling pipes is a structure in which multiple branches are connected in parallel and then in series. In this structure, the number of parallel branches can be adjusted according to the motor power level and heat load level to achieve a match between cooling capacity and system flow resistance. The cooling pipes are divided into multiple parallel branches. The cooling pipes in each branch are connected in series sequentially through end rotary connection sections to form a composite flow structure with series connection within branches and parallel connection between branches. This can achieve more uniform flow distribution in each parallel branch under relatively small pressure drop conditions and maintain a reasonable flow velocity within the branch. The inlet and outlet are arranged side by side on the same end face of the motor to achieve a compact interface layout for water inlet and outlet on the same side; the rotary connection section at the end is provided with a deflection section in the radial direction to reduce the space occupied by the pipe structure in the axial direction and facilitate the integration of the high-speed motor end.

[0013] As a further technical limitation, the stator core is made of amorphous alloy laminations; the stator teeth and the stator yoke are both disposed on the stator core.

[0014] As a further technical limitation, the cooling pipes are located at the radial center of the stator yoke and are uniformly and symmetrically distributed circumferentially.

[0015] As a further technical limitation, the cooling pipe is sealed and connected to the water inlet and water outlet located on the same side of the motor, forming a continuous cooling liquid flow channel.

[0016] As a further technical limitation, the cooling pipe is located in the yoke region above the stator core teeth; the through-pipe structure composed of series and parallel cooling pipes forms a cooling flow channel structure, the through-pipe structure includes multiple parallel branches, each of which consists of multiple cooling pipes connected in series in a U-shaped rotating section and finally flowing into the outlet.

[0017] It should be noted that the present invention arranges the cooling pipes in the corresponding yoke area above the stator teeth, which reduces the magnetic saturation of the yoke caused by the pipes passing through the slots, making the magnetic flux density of the yoke more uniform and the magnetic field line path wider, thus making it more conducive to maintaining good electromagnetic performance.

[0018] Furthermore, each parallel branch adopts a series connection method. After the cooling water enters through the inlet, it sequentially connects with adjacent cooling pipes through the U-shaped rotary connecting section and is discharged from the outlet, forming a U-shaped series flow channel layout with water entering and exiting on the same side.

[0019] It should be noted that the present invention adopts a series-parallel combined flow channel connection method, which can obtain a larger and more uniform branch flow velocity and flow distribution under the condition of small pressure drop, thereby improving cooling efficiency; by adjusting the number of cooling pipes, pipe diameter and the number of series and parallel branches, the synergistic optimization design between motor thermal load, flow resistance and electromagnetic performance can be achieved, thereby enhancing the cooling adaptability under different operating conditions.

[0020] As a further technical limitation, the tube structure is provided with a radial deflection section at the end, which is used to reduce the axial length of the cooling water flow and save space at the motor end.

[0021] It should be noted that the present invention significantly reduces the axial space occupied by the water cooling structure through the compact arrangement of the inlet and outlet on the same side and the radial deflection of the end pipe, which is beneficial for the integration of the high-speed motor end.

[0022] As a further technical limitation, the outer diameter of the cooling pipe is set to 8mm to 12mm.

[0023] As a further technical limitation, the motor is a synchronous motor or an asynchronous motor, and the number of phases of the motor is set to 3 to 6 phases.

[0024] As a further technical limitation, the cooling pipe is made of cupronickel, stainless steel or copper alloy.

[0025] According to some embodiments, the second aspect of the present invention provides a method for using a tube-type stator water cooling device for a high-speed amorphous permanent magnet motor, which adopts a tube-type stator water cooling device for a high-speed amorphous permanent magnet motor provided in the first aspect, and adopts the following technical solution: A method for using a tube-type stator water-cooling device for a high-speed amorphous permanent magnet motor includes: A tube-through structure is provided in the stator yoke of the motor. The circumferential position of the tube-through structure corresponds to the yoke area above the stator teeth, and the radial position is located in the radial middle area of ​​the stator yoke. Several cooling pipes are pre-embedded in the tube-through structure so that the cooling pipes are evenly distributed along the circumference of the stator yoke. Based on the power rating and heat load level of the motor, the number and diameter of the cooling pipes are selected. A series-parallel flow channel connection method is adopted to divide several cooling pipes into multiple parallel branches. The cooling pipes in each parallel branch are connected in series sequentially through the end rotary connection section to form a composite flow structure with series connection within the branch and parallel connection between branches. The inlet and outlet of the cooling pipe are arranged side by side on the same end face of the motor, and a deflection section is set in the radial direction at the end rotary connection section to reduce the axial space occupied. Start the cooling system so that the cooling liquid enters from the inlet and flows through the series cooling pipes in each parallel branch in sequence, absorbing the heat generated by the stator yoke, stator teeth and winding coils, and is discharged from the outlet, forming a tube-type water cooling circulation for the stator core and windings. By adjusting the number of parallel branches, the diameter of the cooling water pipes, and the flow rate of the cooling water, the magnetic flux density distribution of the stator yoke of the motor is made uniform and the flow resistance of the cooling liquid is controllable during operation. The maximum temperature of the winding is controlled below the set threshold, thereby achieving synergistic optimization of thermal management and electromagnetic performance during continuous operation of the motor.

[0026] As a further technical limitation, the high-speed amorphous permanent magnet motor through-tube stator water cooling device includes a stator core, a through-tube structure disposed in the stator yoke, a plurality of cooling pipes disposed in the through-tube structure, an end rotary connection section for connecting the cooling pipes, and an inlet and an outlet connected to the cooling pipes. The circumferential direction of the tube structure is located in the yoke region of the stator teeth, which is used to reduce the risk of local magnetic saturation of the yoke caused by the tube structure above the stator slot, so as to make the magnetic flux density distribution of the stator yoke uniform and reduce the adverse effects of the tube structure on electromagnetic performance; the radial direction of the tube structure is located in the radial middle region of the stator yoke, so as to shorten the heat conduction path of the stator yoke to the cooling water, forming an efficient heat transfer path of "yoke - tube wall - water inside the tube"; The main body of the through-pipe structure adopts cooling pipes. The number and diameter of the cooling pipes are determined based on the comprehensive constraints of cooling heat exchange area, flow resistance and effective magnetic cross-sectional area of ​​the yoke. The number of cooling pipes is 12-48, and the outer diameter of the cooling pipes is 8-12mm, so as to obtain better heat exchange capacity under controllable pressure drop and take into account the iron loss level. Several cooling pipes are connected in series and parallel to form a through-pipe structure. The main body of the cooling pipes is a structure in which multiple branches are connected in parallel and then in series. In this structure, the number of parallel branches can be adjusted according to the motor power level and heat load level to achieve a match between cooling capacity and system flow resistance. The cooling pipes are divided into multiple parallel branches. The cooling pipes in each branch are connected in series sequentially through end rotary connection sections to form a composite flow structure with series connection within branches and parallel connection between branches. This can achieve more uniform flow distribution in each parallel branch under relatively small pressure drop conditions and maintain a reasonable flow velocity within the branch. The inlet and outlet are arranged side by side on the same end face of the motor to achieve a compact interface layout for water inlet and outlet on the same side; the rotary connection section at the end is provided with a deflection section in the radial direction to reduce the space occupied by the pipe structure in the axial direction and facilitate the integration of the high-speed motor end.

[0027] As a further technical limitation, the stator core is made of amorphous alloy laminations; the stator teeth and the stator yoke are both disposed on the stator core.

[0028] As a further technical limitation, the cooling pipes are located at the radial center of the stator yoke and are uniformly and symmetrically distributed circumferentially.

[0029] As a further technical limitation, the cooling pipe is sealed and connected to the water inlet and water outlet located on the same side of the motor, forming a continuous cooling liquid flow channel.

[0030] As a further technical limitation, the cooling pipe is located in the yoke region above the stator core teeth; the through-pipe structure composed of series and parallel cooling pipes forms a cooling flow channel structure, the through-pipe structure includes multiple parallel branches, each of which consists of multiple cooling pipes connected in series in a U-shaped rotating section and finally flowing into the outlet.

[0031] It should be noted that the present invention arranges the cooling pipes in the corresponding yoke area above the stator teeth, which reduces the magnetic saturation of the yoke caused by the pipes passing through the slots, making the magnetic flux density of the yoke more uniform and the magnetic field line path wider, thus making it more conducive to maintaining good electromagnetic performance.

[0032] Furthermore, each parallel branch adopts a series connection method. After the cooling water enters through the inlet, it sequentially connects with adjacent cooling pipes through the U-shaped rotary connecting section and is discharged from the outlet, forming a U-shaped series flow channel layout with water entering and exiting on the same side.

[0033] It should be noted that the present invention adopts a series-parallel combined flow channel connection method, which can obtain a larger and more uniform branch flow velocity and flow distribution under the condition of small pressure drop, thereby improving cooling efficiency; by adjusting the number of cooling pipes, pipe diameter and the number of series and parallel branches, the synergistic optimization design between motor thermal load, flow resistance and electromagnetic performance can be achieved, thereby enhancing the cooling adaptability under different operating conditions.

[0034] As a further technical limitation, the tube structure is provided with a radial deflection section at the end, which is used to reduce the axial length of the cooling water flow and save space at the motor end.

[0035] It should be noted that the present invention significantly reduces the axial space occupied by the water cooling structure through the compact arrangement of the inlet and outlet on the same side and the radial deflection of the end pipe, which is beneficial for the integration of the high-speed motor end.

[0036] As a further technical limitation, the outer diameter of the cooling pipe is set to 8mm to 12mm.

[0037] As a further technical limitation, the motor is a synchronous motor or an asynchronous motor, and the number of phases of the motor is set to 3 to 6 phases.

[0038] As a further technical limitation, the cooling pipe is made of cupronickel, stainless steel or copper alloy.

[0039] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention arranges the cooling pipes in the corresponding yoke area above the stator teeth, optimizes the pipe insertion position, reduces the magnetic saturation of the yoke caused by pipe insertion above the slot, significantly reduces the risk of local magnetic saturation of the yoke, makes the magnetic flux density distribution more uniform, and reduces the adverse effects of pipe insertion on electromagnetic performance. This invention adopts a series-parallel combined flow channel connection method, which can obtain a larger and more uniform branch flow velocity and flow distribution under the condition of small pressure drop. The cooling pipe is set in the radial middle of the yoke, forming a short thermal path of "yoke-pipe wall-cooling water", which greatly shortens the heat transfer path and improves the cooling efficiency of stator core and winding.

[0040] This invention adjusts the number, diameter, and number of series and parallel branches of cooling pipes, and adopts a series-parallel composite flow channel with "series connection within branches and parallel connection between branches". Compared with the fully series structure, the pressure drop is significantly reduced, and compared with the multi-parallel structure, the flow distribution is more uniform. This achieves a synergistic optimization design between motor thermal load, flow resistance and electromagnetic performance, thereby enhancing the cooling adaptability under different operating conditions. The present invention significantly reduces the axial space occupied by the water cooling structure by the compact arrangement of the inlet and outlet on the same side and the radial deflection of the end pipe, effectively shortens the axial length of the water cooling structure, facilitates the integration of the high-speed motor end, and is conducive to the miniaturization of the whole machine. This invention can achieve flexible matching between cooling capacity, flow resistance and electromagnetic performance by adjusting the number of pipes, pipe diameter and number of parallel branches. It is suitable for different power levels and heat load conditions, has a compact structure, reliable technical solution implementation, saves space and materials, has a significant cooling effect and is environmentally friendly. Attached Figure Description

[0041] The accompanying drawings, which form part of this embodiment, are used to provide a further understanding of this embodiment. The illustrative embodiments and their descriptions are used to explain this embodiment and do not constitute an improper limitation of this embodiment.

[0042] Figure 1 This is a schematic diagram comparing the stator yoke tube insertion position and magnetic flux density distribution in an embodiment of the present invention; Figure 2 This is a schematic diagram of a pipe-through model with different numbers of pipes in an embodiment of the present invention; Figure 3 This is a line graph showing the maximum water pressure for different pipe quantity schemes in this embodiment of the invention; Figure 4 This is a line graph showing the variation of maximum water pressure with pipe diameter in an embodiment of the present invention; Figure 5 This is a diagram showing the pipe pressure distribution under different pipe connection methods in an embodiment of the present invention; Figure 6 This is a comparison diagram of branch water flow velocities under different pipe connection methods in embodiments of the present invention; Figure 7 This is a schematic diagram of the actual structure principle of the tube-type stator water-cooling structure in an embodiment of the present invention; Figure 8 This is a schematic diagram of a three-dimensional fluid-structure interaction simulation of a motor in an embodiment of the present invention; Figure 9 This is a schematic diagram of the temperature distribution of each component in the finite element simulation of this invention embodiment; Figure 10 This is a schematic diagram comparing the water-cooled structure and the casing water jacket cooling structure in an embodiment of the present invention; Figure 11 This is a comparison diagram of the cross-sectional temperatures of the water-cooled structure and the water jacket of the casing in an embodiment of the present invention; Figure 12 This is a line graph showing the maximum winding temperature under different flow rates in an embodiment of the present invention. Figure 13 This is a schematic diagram of the simulation experiment platform in an embodiment of the present invention; Figure 14 This is a line graph of the motor temperature in the simulation experiment of this invention embodiment; The components include: 1. Magnetic field distribution structure of the stator yoke tube area; 2. Stator yoke; 3. Cooling pipe; 4. Stator slot; 5. Winding coil; 6. Water inlet; 7. Water outlet; 8. Brass pressure ring; 9. Equivalent insulation; 10. Rotor; 11. Stator core; 12. Housing cooling channel; 13. Housing; 14. Stator tie rod; 15. Carbon fiber sheath; 16. Temperature monitoring instrument; 17. Load motor; 18. Temperature acquisition module; and 19. Prototype of a stator tube-cooled six-phase permanent magnet synchronous motor. Detailed Implementation

[0043] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0044] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0045] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0046] In this invention, terms such as "upper," "lower," "left," "right," "front," "back," "vertical," "horizontal," "side," and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only to facilitate the description of the structural relationships of the various components or elements of this invention and do not specifically refer to any component or element in this invention. They should not be construed as limiting the invention.

[0047] In this invention, terms such as "fixed connection," "connected," and "linked" should be interpreted broadly, indicating a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can determine the specific meaning of these terms in this invention based on the specific circumstances, and they should not be construed as limitations on the invention.

[0048] Where there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0049] Example 1 Embodiment 1 of the present invention introduces a tube-type stator water cooling device for a high-speed amorphous permanent magnet motor.

[0050] Most existing high-speed amorphous permanent magnet motor stator water cooling devices with tubes place the cooling pipes in the stator yoke. The unreasonable design of the cooling pipe position can easily cause local magnetic saturation in the stator yoke, increase iron loss, and degrade electromagnetic performance. At the same time, the existing tube structures mostly adopt fully series flow channels, which result in large pressure drop, uneven flow distribution, low cooling efficiency, and large space occupation of the end structure, which is not conducive to the compact integration of high-speed motors.

[0051] Existing technologies can employ a stator water-cooling structure for hub motors, making heat dissipation more uniform, avoiding axial temperature gradients, improving heat dissipation efficiency, and effectively solving the problem of motor temperature rise. High-energy-density permanent magnet motor water-cooling systems can be used to directly cool the main heat-generating components of the motor, such as the windings and core, greatly improving heat dissipation efficiency. Due to the simple cooling water channels and fewer bends, the flow resistance of the cooling water is significantly reduced, the water pump pressure is lowered, the uniformity of the motor's temperature distribution is significantly improved, the heat dissipation capacity is greatly enhanced, and the torque density of the motor is increased.

[0052] Existing technology can employ a liquid-cooled flat-plate linear permanent magnet synchronous motor, with the cooling device located inside the primary core yoke of the linear motor. The arrangement of the cooling pipes is completely different from that of existing similar cooling pipes, using an alternating arrangement of inlet and outlet pipes. This improves cooling capacity and thrust density, effectively reduces the temperature difference between the front and rear ends of the motor, and brings the local temperature of each part of the armature core towards equilibrium. This reduces the thermal resistance between the winding and the core, achieving the technical effect of reducing winding copper loss and improving motor efficiency.

[0053] Based on this, this embodiment provides a novel stator water cooling device that can efficiently dissipate heat from the stator windings and core while also taking into account electromagnetic performance, flow resistance, and structural compactness.

[0054] This embodiment uses, as follows: Figure 7 The high-speed amorphous permanent magnet motor stator water-cooling device shown adopts a tube-type structure. Based on the two principles of electromagnetic performance constraint and heat transfer and flow mechanism, the motor structure is improved. The main structure includes the magnetic field distribution structure 1 of the stator yoke tube area, stator yoke 2, cooling pipe 3, stator slot 4, winding coil 5, water inlet 6, water outlet 7, brass pressure ring 8, equivalent insulation 9, rotor 10, stator core 11, housing cooling channel 12, housing 13, stator tie rod 14, carbon fiber sheath 15, temperature monitoring instrument 16, load motor 17, temperature acquisition module 18, and stator tube-type water-cooled six-phase permanent magnet synchronous motor prototype 19.

[0055] To investigate the impact of the stator yoke 2-tube through-tube on the electromagnetic performance of the motor, this embodiment establishes a two-dimensional electromagnetic field simulation model, employing, as follows: Figure 1The design shown is a structure with cooling pipes 3 passing through the stator teeth and stator slots of the motor. The main feature of the cooling structure design is determined by the magnetic field distribution structure 1 in the stator yoke 2 pipe area. The cooling pipes 3 are pre-embedded in the stator yoke 2. The magnetic permeability of the material of the stator yoke 2 is higher than that of the cooling pipes 3. The pipes will cause the magnetic field lines and magnetic flux density to redistribute.

[0056] In this embodiment, the winding coil 5 is set inside the stator slot 4. When the tube is located above the stator slot 4, the stator yoke 2 exhibits obvious magnetic saturation. When the tube is located above the stator teeth, the magnetic flux density distribution of the stator yoke 2 is more uniform, the magnetic field line path is wider, and the magnetic field characteristics are better, which is more conducive to reducing the adverse effects of the tube on the electromagnetic performance. The tube structure design will cause an increase in iron loss, and the iron loss increases with the increase of the number of tubes and the increase of the tube diameter. A comprehensive compromise design is required between the heat exchange area, the effective magnetic cross section, and the iron loss. The stator yoke 2 and the winding coil 5 are among the main heat source areas. The cooling pipe 3 is set in the stator yoke 2 and close to the radial center of the yoke to shorten the heat conduction distance from the stator yoke 2 to the cooling water, forming a short thermal path structure of "yoke - pipe wall - water inside the pipe".

[0057] To determine a reasonable number of cooling pipes, while keeping the pipe diameter and flow channel connection method constant, such as Figure 2 As shown, this embodiment sets up multiple structural models with different numbers of cooling pipes for comparative analysis, and studies the pressure changes in the cooling channels of each scheme under different inlet water flow rates.

[0058] Analysis results show that as the number of cooling pipes increases, the number of cooling channels increases accordingly, and the contact area of ​​the fluid-solid interface expands significantly. This is beneficial to enhancing the heat exchange capacity between the stator core and the cooling medium, thereby improving the heat conduction efficiency and the uniformity of the internal temperature field of the motor.

[0059] However, if the pipe diameter and connection method remain unchanged, such as Figure 3 As shown, increasing the number of cooling pipes will also lead to a gradual increase in the maximum water pressure within the cooling channels, and consequently, an increase in flow resistance. When the number of cooling pipes is excessive, although the heat exchange area further increases, the flow resistance increases significantly, which not only increases the pumping power consumption of the cooling system but also increases the system's manufacturing and maintenance costs.

[0060] Therefore, determining the number of cooling pipes requires a comprehensive trade-off between improving cooling performance and controlling system flow resistance and power consumption.

[0061] Based on the above analysis and combined with the structural dimensions and cooling requirements of high-speed amorphous permanent magnet motors, this embodiment selects 24 cooling pipes as the specific implementation scheme for the stator yoke tube structure to achieve a balance between cooling performance and overall system efficiency.

[0062] After determining the number of cooling pipes, this embodiment further analyzes the diameter of the cooling pipes. By establishing models with different pipe diameters and performing fluid simulation calculations, the influence of changes in the cooling pipe diameter on the flow channel pressure drop and heat transfer capacity is studied.

[0063] like Figure 4 As shown, with the number of pipes remaining constant, as the cooling pipe diameter increases, the maximum water pressure in the cooling channel gradually decreases, while the fluid-solid interface contact area increases, which is beneficial for improving heat exchange capacity. However, excessively large pipe diameters increase the difficulty of structural layout and reduce the effective magnetic cross-sectional area of ​​the stator yoke.

[0064] Therefore, after comprehensively considering factors such as processing and manufacturing, structural strength and electromagnetic performance, this embodiment selects a cooling pipe 3 with an outer diameter of 10mm as the preferred option.

[0065] Regarding the flow channel connection structure, a comparative analysis is conducted on fully series connection structures and composite flow channel structures with different numbers of parallel branches, comparing their pipe pressure distribution and the flow velocity at the center section of the branches, for example... Figure 5 and Figure 6 As shown.

[0066] Simulation results show that although the fully series structure is simple, the cooling fluid flow path is long, resulting in a large system pressure drop and a significant temperature gradient along the path. When the number of parallel branches is too large, the flow distribution in each branch is uneven, and the local flow velocity decreases. When the number of parallel branches is too small, the maximum system pressure increases. By comprehensively comparing the pressure distribution and branch flow velocity of different structural schemes, the three-parallel structure achieves a better balance between pressure drop control and flow uniformity. Therefore, this embodiment preferably adopts a three-parallel series-parallel composite flow channel structure.

[0067] It should be noted that the number of parallel branches in a series-parallel flow channel is not limited to three; the specific number can be adjusted according to the motor power rating and heat load level. When the motor heat load is high or the cooling demand is large, the number of parallel branches can be appropriately increased to improve the cooling capacity; when the motor heat load is low or the structural space is limited, the number of parallel branches can be reduced to reduce the system pressure drop, thereby achieving a reasonable match between cooling capacity and flow resistance.

[0068] In this embodiment, 24 cooling pipes 3 are pre-embedded in the yoke area of ​​the stator core 11 and are evenly distributed along the circumference. Each cooling pipe is connected in series through an end rotary connection structure to form multiple cooling branches and is connected to the water inlet 6 and the water outlet 7. In this embodiment, it is preferable to form three parallel branches.

[0069] The number of parallel branches in this embodiment can be adjusted according to the motor's heat load and cooling requirements to adapt to the heat dissipation requirements of motors with different power ratings. To reduce the axial dimension of the motor, a radial deflection is provided in the end connection structure so that the cooling pipe 3 is connected in the radial direction at the end, thereby reducing the axial space occupied and improving the structural compactness.

[0070] In this embodiment, the cooling pipes are arranged in the yoke area above the stator teeth, optimizing the pipe insertion position and reducing the magnetic saturation of the yoke caused by pipe insertion above the slot. This significantly reduces the risk of local magnetic saturation of the yoke, makes the magnetic flux density distribution more uniform, and reduces the adverse effects of pipe insertion on electromagnetic performance. This embodiment adopts a series-parallel combined flow channel connection method, which can obtain a larger and more uniform branch flow velocity and flow distribution under the condition of small pressure drop. The cooling pipe is set in the radial middle of the yoke, forming a short thermal path of "yoke-pipe wall-cooling water", which greatly shortens the heat transfer path and improves the cooling efficiency of stator core and winding.

[0071] This embodiment adjusts the number of cooling pipes, pipe diameter, and the number of series and parallel branches, and adopts a series-parallel composite flow channel with "series connection within branches and parallel connection between branches". Compared with the fully series structure, the pressure drop is significantly reduced, and compared with the multi-parallel structure, the flow distribution is more uniform. This achieves a synergistic optimization design between motor thermal load, flow resistance, and electromagnetic performance, thereby enhancing the cooling adaptability under different operating conditions.

[0072] This embodiment significantly reduces the axial space occupied by the water-cooling structure through the compact arrangement of the inlet and outlet on the same side and the radial deflection of the end pipes, effectively shortening the axial length of the water-cooling structure, facilitating the integration of the high-speed motor end, and contributing to the miniaturization of the whole machine. By adjusting the number of pipes, pipe diameter, and number of parallel branches, a flexible match can be achieved between cooling capacity, flow resistance, and electromagnetic performance. It is suitable for different power levels and heat load conditions, with a compact structure, reliable technical solution implementation, space and material savings, significant cooling effect, and environmentally friendly application.

[0073] Example 2 In Embodiment 2 of the present invention, the temperature distribution, hot spot location and cooling effect of the motor stator water-cooling structure in Embodiment 1 are verified by finite element simulation.

[0074] The simulation model in this embodiment is established as follows: Figure 8 The three-dimensional model shown includes a stator core 11, winding coils 5, equivalent insulation 9, rotor 10, and cooling pipes 3. 24 cooling pipes 3 are arranged inside the stator core 11 to form a pipe-cooled structure.

[0075] Cooling water enters the pipe through inlet 6, absorbs heat during internal flow, and is discharged through outlet 7. During the simulation, the cooling water flow rate is set to 5 L / min, and the ambient temperature and inlet water temperature are used as boundary conditions to calculate the internal temperature field of the motor, resulting in the following... Figure 9 The simulation results are shown in Table 1.

[0076] Table 1 Simulation Results

[0077] Based on simulation results, the highest temperature is located in the end winding, reaching 81.4℃. The average temperature of the end winding is 79.6℃, and the average temperature of the slot winding is 72.3℃. The stator core temperature shows a distribution pattern where the tooth section is higher than the yoke section, and the non-tube section of the yoke section is higher than the tube section of the yoke section, with a relatively small circumferential temperature gradient. The contact area between the cooling pipe and the stator yoke has a relatively high temperature, with a maximum temperature of 44.9℃. The cooling water absorbs the heat generated by the motor during its flow in the pipe, resulting in a higher temperature at the pipe outlet section than at the inlet section, which has a certain impact on the circumferential temperature distribution of the motor. The highest temperature of the motor rotor structure is 65.3℃, which is lower than the overall stator structure temperature, and the rotor temperature gradually decreases from the center to both sides along the axial direction. like Figure 10 As shown, a set of comparative models with the same main parameters but using housing water jacket cooling are set up and the boundary conditions are kept consistent; the cooling pipes 12 of housing water jacket cooling are located inside the housing 13 and arranged in an axial Z-shape, and the housing surrounds the outside of the stator core 11.

[0078] like Figure 11 As shown, the highest temperature of the comparison model is 98.5℃ and the hot spot is located at the end of the winding. With different flow conditions, the following results were obtained: Figure 12 The diagram shows a comparison of the highest winding temperatures.

[0079] When the flow rate is low, the cooling efficiency is low, and the cooling capacity of the pipe-cooled model is insufficient, resulting in a higher winding temperature than the casing-cooled model. As the flow rate increases, the cooling efficiency of both models improves. When the water flow rate is 0.5 L / min, the maximum winding temperatures of both models are similar. At this point, the cooling efficiency of the pipe-cooled model is already higher than that of the casing-cooled model.

[0080] When the flow rate is 5 L / min, compared with the minimum flow rate, the maximum winding temperature of the stator tube-cooled model is reduced by 97.2℃, and that of the casing water-jacketed model is reduced by 81.9℃. The cooling efficiency of the tube-cooled water cooling is 18.6% higher than that of the casing water-jacketed model.

[0081] In actual operation, the water flow rate is generally higher than 3L / min. At this time, compared with the stator tube water cooling structure, the maximum temperature rise of the comparative scheme increases significantly, thus verifying that under the same boundary conditions, the tube-type motor stator water cooling structure of this embodiment has better cooling performance.

[0082] To address the issues of high temperature rise in stator windings and stator core of high-speed amorphous permanent magnet motors under high-speed operation, long heat transfer paths in traditional water jacket cooling systems, insufficient control of hot spots in windings, and the potential for local magnetic saturation and increased iron losses when arranging cooling pipes in the stator yoke, Embodiment 2 of this invention, combined with finite element analysis, collaboratively designs the stator yoke pipe placement, cooling pipe parameters, and flow channel connection methods under electromagnetic performance constraints. This brings the cooling medium closer to the main heat source area of ​​the stator, shortening the heat transfer path. While ensuring the electromagnetic performance of the motor, this collaboratively suppresses the temperature rise of multiple key components such as the stator windings, stator teeth, and stator yoke, thereby improving the continuous operational reliability of the high-speed amorphous permanent magnet motor.

[0083] Example 3 Embodiment 3 of the present invention is used to verify the temperature rise control effect and temperature distribution law of the motor stator water cooling structure involved in Embodiment 1 on the actual prototype.

[0084] This embodiment is set up as follows: Figure 13 The experimental test platform shown is used to fabricate a prototype of a six-phase permanent magnet synchronous motor with a tube-type water-cooled structure. The prototype has six stator tie rods 14 evenly distributed on the outside of the stator core 11 to support the motor housing and provide a channel for motor cooling. The winding coils 5 are placed in the stator slots 4 of the stator core 11.

[0085] In this embodiment, the cooling pipe 3 is pre-embedded in the core yoke 2 of the stator core 11, forming a series-parallel composite flow channel through the end rotary connection section; the carbon fiber sheath 15 covers the outer surface of the rotor 10, and the brass pressure ring 8 is located on both sides of the rotor 10 to protect the permanent magnet structure; the temperature rise experimental platform built based on the experimental prototype includes a temperature monitoring instrument 16, a load motor 17, a water inlet 6, a water outlet 7, a temperature acquisition module 18, and a stator tube-insulated water-cooled six-phase permanent magnet synchronous motor prototype 19; temperature measuring points are arranged in the slot winding, the end winding, and the stator yoke, respectively, and the temperature measuring points are evenly distributed along the circumference. The average temperature of the component is obtained by averaging multiple temperature measuring points of the same component, which is used to characterize the thermal state after the temperature rise stabilizes.

[0086] In the prototype platform, as shown in Table 2, when the motor is running at its rated speed, the ambient temperature is 31.6℃, the inlet water temperature is 33.7℃, and the inlet water flow rate is 5L / min. The temperatures at each measuring point obtained from the temperature rise experiment were averaged at six points for the same component, as shown in Table 2. Figure 14 The average temperature curves of each component are shown.

[0087] Table 2 Rated operating parameters of the motor

[0088] As shown in Table 3, when the prototype temperature stabilizes, the end winding temperature is 81.3℃, the slot winding temperature is 73.4℃, and the temperature of the stator yoke without tubes is 60.4℃. Furthermore, the arrangement of temperature measurement points and the averaging method are as described above, corroborating the conclusion that the highest temperature is located in the end winding and the winding temperature is higher than the core temperature. In this embodiment, the average temperature of the yoke without tubes, the winding in the slot, and the end winding obtained by simulation are compared with the temperature measured experimentally. The error should be within a reasonable range. For example, in a set of comparisons, as shown in Table 4, the experimental and fluid-structure interaction simulation results at the above three locations are as follows: 60.4℃ and 58.1℃ for the yoke without tube penetration, 73.4℃ and 72.3℃ for the winding in the slot, and 81.3℃ and 79.6℃ for the end winding, which verifies that the simulation model has a consistent characterization of the temperature distribution.

[0089] Table 3 Motor operating parameters when the prototype temperature rise stabilizes

[0090] Table 4 Simulation Comparison

[0091] In this embodiment, the cooling pipes are arranged in the yoke area above the stator teeth, optimizing the pipe insertion position and reducing the magnetic saturation of the yoke caused by pipe insertion above the slot. This significantly reduces the risk of local magnetic saturation of the yoke, makes the magnetic flux density distribution more uniform, and reduces the adverse effects of pipe insertion on electromagnetic performance. This embodiment adopts a series-parallel combined flow channel connection method, which can obtain a larger and more uniform branch flow velocity and flow distribution under the condition of small pressure drop. The cooling pipe is set in the radial middle of the yoke, forming a short thermal path of "yoke-pipe wall-cooling water", which greatly shortens the heat transfer path and improves the cooling efficiency of stator core and winding.

[0092] This embodiment adjusts the number of cooling pipes, pipe diameter, and the number of series and parallel branches, and adopts a series-parallel composite flow channel with "series connection within branches and parallel connection between branches". Compared with the fully series structure, the pressure drop is significantly reduced, and compared with the multi-parallel structure, the flow distribution is more uniform. This achieves a synergistic optimization design between motor thermal load, flow resistance, and electromagnetic performance, thereby enhancing the cooling adaptability under different operating conditions. This embodiment significantly reduces the axial space occupied by the water cooling structure through the compact arrangement of the inlet and outlet on the same side and the radial deflection of the end pipe, effectively shortens the axial length of the water cooling structure, facilitates the integration of the high-speed motor end, and is conducive to the miniaturization of the whole machine. This embodiment can achieve flexible matching between cooling capacity, flow resistance and electromagnetic performance by adjusting the number of pipes, pipe diameter and number of parallel branches. It is suitable for different power levels and heat load conditions. It has a compact structure, reliable technical solution, saves space and materials, has a significant cooling effect and is environmentally friendly.

[0093] Example 4 Embodiment 4 of the present invention introduces a method for using a tube-type stator water cooling device for a high-speed amorphous permanent magnet motor, which adopts the tube-type stator water cooling device for a high-speed amorphous permanent magnet motor introduced in Embodiment 1.

[0094] A method for using a tube-type stator water-cooling device for a high-speed amorphous permanent magnet motor includes: A tube-through structure is provided in the stator yoke of the motor. The circumferential position of the tube-through structure corresponds to the yoke area above the stator teeth, and the radial position is located in the radial middle area of ​​the stator yoke. Several cooling pipes are pre-embedded in the tube-through structure so that the cooling pipes are evenly distributed along the circumference of the stator yoke. Based on the power rating and heat load level of the motor, the number and diameter of the cooling pipes are selected. A series-parallel flow channel connection method is adopted to divide several cooling pipes into multiple parallel branches. The cooling pipes in each parallel branch are connected in series sequentially through the end rotary connection section to form a composite flow structure with series connection within the branch and parallel connection between branches. The inlet and outlet of the cooling pipe are arranged side by side on the same end face of the motor, and a deflection section is set in the radial direction at the end rotary connection section to reduce the axial space occupied. Start the cooling system so that the cooling liquid enters from the inlet and flows through the series cooling pipes in each parallel branch in sequence, absorbing the heat generated by the stator yoke, stator teeth and winding coils, and is discharged from the outlet, forming a tube-type water cooling circulation for the stator core and windings. By adjusting the number of parallel branches, the diameter of the cooling water pipes, and the flow rate of the cooling water, the magnetic flux density distribution of the stator yoke of the motor is made uniform and the flow resistance of the cooling liquid is controllable during operation. The maximum temperature of the winding is controlled below the set threshold, thereby achieving synergistic optimization of thermal management and electromagnetic performance during continuous operation of the motor.

[0095] As one or more implementation methods, the high-speed amorphous permanent magnet motor stator water cooling device prepared in this embodiment includes a stator core, a tube structure disposed in the stator yoke, a plurality of cooling pipes disposed in the tube structure, an end rotary connection section for connecting the cooling pipes, and an inlet and an outlet connected to the cooling pipes. The circumferential direction of the tube structure is located in the yoke region of the stator teeth, which is used to reduce the risk of local magnetic saturation of the yoke caused by the tube structure above the stator slot, so as to make the magnetic flux density distribution of the stator yoke uniform and reduce the adverse effects of the tube structure on electromagnetic performance; the radial direction of the tube structure is located in the radial middle region of the stator yoke, so as to shorten the heat conduction path of the stator yoke to the cooling water, forming an efficient heat transfer path of "yoke - tube wall - water inside the tube"; The main body of the through-pipe structure adopts cooling pipes, and the number and diameter of the cooling pipes are determined based on the comprehensive constraints of cooling heat exchange area, flow resistance and effective magnetic cross-sectional area of ​​the yoke. The number of cooling pipes is 12-48, and the outer diameter of the cooling pipes is 8-12mm, so as to obtain better heat exchange capacity under controllable pressure drop and take into account the iron loss level. Several cooling pipes are connected by a series and parallel flow channel to form a through-pipe structure. The main body of several cooling pipes is a structure in which multiple branches are connected in parallel and then in series. In this structure, the number of parallel branches can be adjusted according to the motor power level and heat load level to achieve a match between cooling capacity and system flow resistance. Several cooling pipes are divided into multiple parallel branches. The cooling pipes in each branch are connected in series through end rotary connection sections to form a composite flow structure with series connection within branches and parallel connection between branches. This can achieve more uniform flow distribution in each parallel branch under relatively small pressure drop conditions and maintain a reasonable flow velocity within the branch. The inlet and outlet are arranged side by side on the same end face of the motor to achieve a compact interface layout for water inlet and outlet on the same side; the rotary connection section at the end is provided with a deflection section in the radial direction to reduce the space occupied by the pipe structure in the axial direction and facilitate the integration of the high-speed motor end.

[0096] In this embodiment, the winding coil 5 is disposed within the stator slot 4. When the tube is located above the stator slot 4, the stator yoke 2 exhibits significant magnetic saturation. When the tube is located above the stator teeth, the magnetic flux density distribution in the stator yoke 2 is more uniform, the magnetic field lines are wider, and the magnetic field characteristics are superior, which is more conducive to reducing the adverse effects of the tube on electromagnetic performance. The tube structure design will increase iron loss, and the iron loss increases with the increase of the number of tubes and the increase of the tube diameter. A comprehensive compromise design is required between the heat exchange area, the effective magnetic cross-section, and the iron loss. In this embodiment, the stator yoke 2 and the winding coil 5 are one of the main heat source areas. The cooling pipe 3 is set in the stator yoke 2 and close to the radial center of the yoke to shorten the conduction distance of heat from the stator yoke 2 to the cooling water, forming a short thermal path structure of "yoke - pipe wall - water inside the pipe".

[0097] As one or more embodiments, the stator core in this embodiment is made of amorphous alloy laminations; the stator teeth and the stator yoke are both disposed on the stator core.

[0098] As one or more embodiments, in this embodiment, the cooling pipes are located at the radial center of the stator yoke and are uniformly and symmetrically distributed along the circumference.

[0099] As one or more implementation methods, in this embodiment, the cooling pipe is sealed and connected to the water inlet and water outlet located on the same side of the motor to form a continuous cooling liquid flow channel.

[0100] As one or more implementation methods, in this embodiment, the cooling pipe is arranged in the yoke region above the stator core teeth; the through-pipe structure composed of series and parallel cooling pipes forms a cooling flow channel structure, the through-pipe structure includes multiple parallel branches, each of which is composed of multiple cooling pipes connected in series in a U-shaped rotating section and finally flows into the outlet.

[0101] As one or more implementation methods, each parallel branch in this embodiment adopts a series connection method. After the cooling water enters through the inlet, it sequentially connects the adjacent cooling pipes through the U-shaped rotary connecting section and is discharged from the outlet, forming a U-shaped series flow channel layout with water entering and exiting on the same side.

[0102] As one or more embodiments, the tube structure in this embodiment has a radial deflection section at the end, which is used to reduce the axial length of the cooling water flow and save space at the motor end.

[0103] As one or more implementation methods, the outer diameter of the cooling pipe in this embodiment is set to 8mm to 12mm.

[0104] As one or more implementation methods, the motor in this embodiment is a synchronous motor or an asynchronous motor, and the number of phases of the motor is set to 3 to 6 phases.

[0105] As one or more implementation methods, the cooling pipes in this embodiment are made of cupronickel, stainless steel or copper alloy.

[0106] This embodiment can achieve flexible matching between cooling capacity, flow resistance and electromagnetic performance by adjusting the number of pipes, pipe diameter and number of parallel branches. It is suitable for different power levels and heat load conditions. It has a compact structure, reliable technical solution, saves space and materials, has a significant cooling effect and is environmentally friendly.

[0107] The number of parallel branches in this embodiment can be adjusted according to the motor's heat load and cooling requirements to adapt to the heat dissipation requirements of motors with different power ratings. To reduce the axial dimension of the motor, a radial deflection is provided in the end connection structure so that the cooling pipe 3 is connected in the radial direction at the end, thereby reducing the axial space occupied and improving the structural compactness.

[0108] In this embodiment, the cooling pipes are arranged in the yoke region above the stator teeth, optimizing the pipe placement and reducing magnetic saturation of the yoke caused by pipes above the slots. This significantly reduces the risk of local magnetic saturation in the yoke, resulting in a more uniform magnetic flux density distribution and minimizing the adverse effects of pipe placement on electromagnetic performance. By adopting a series-parallel flow channel connection method, a larger and more uniform branch flow velocity and flow rate distribution can be obtained under conditions of low pressure drop. The cooling pipes are placed in the radial middle of the yoke, forming a short thermal path of "yoke-pipe wall-cooling water", which greatly shortens the heat transfer path and improves the cooling efficiency of the stator core and windings.

[0109] This embodiment adjusts the number of cooling pipes, pipe diameter, and the number of series and parallel branches, and adopts a series-parallel composite flow channel with "series connection within branches and parallel connection between branches". Compared with the fully series structure, the pressure drop is significantly reduced, and compared with the multi-parallel structure, the flow distribution is more uniform. This achieves a synergistic optimization design between motor thermal load, flow resistance, and electromagnetic performance, thereby enhancing the cooling adaptability under different operating conditions.

[0110] This embodiment significantly reduces the axial space occupied by the water-cooling structure through the compact arrangement of the inlet and outlet on the same side and the radial deflection of the end pipes, effectively shortening the axial length of the water-cooling structure, facilitating the integration of the high-speed motor end, and contributing to the miniaturization of the whole machine. By adjusting the number of pipes, pipe diameter, and number of parallel branches, a flexible match can be achieved between cooling capacity, flow resistance, and electromagnetic performance. It is suitable for different power levels and heat load conditions, with a compact structure, reliable technical solution implementation, space and material savings, significant cooling effect, and environmentally friendly application.

[0111] The detailed steps are the same as the working principle of the high-speed amorphous permanent magnet motor stator water cooling device with tubes provided in Example 1, and will not be repeated here.

[0112] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. The solutions in the embodiments of the present invention can be implemented using various computer languages, such as the object-oriented programming language Java and the interpreted scripting language JavaScript.

[0113] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0114] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0115] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0116] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0117] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

[0118] The above description is merely a preferred embodiment of this practice and is not intended to limit the scope of this practice. Various modifications and variations can be made to this practice by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this practice should be included within the protection scope of this practice.

Claims

1. A high-speed amorphous permanent magnet motor stator water-cooling device with through-tube design, characterized in that, The device includes a stator core, a through-tube structure disposed in the stator yoke, several cooling pipes disposed within the through-tube structure, an end rotary connection section for connecting the cooling pipes, and an inlet and an outlet connected to the cooling pipes. The through-tube structure is circumferentially located in the yoke region of the stator teeth; its radial direction is located in the radial center region of the stator yoke. The main body of the through-tube structure is composed of cooling pipes, the number and diameter of which are determined based on a comprehensive constraint of cooling heat exchange area, flow resistance, and the effective magnetic cross-sectional area of ​​the yoke. Several cooling pipes are connected in a series-parallel flow channel configuration to form the through-tube structure. The cooling pipes are divided into multiple parallel branches, with the cooling pipes within each branch connected in series via end rotary connection sections, forming a composite flow structure of series connection within branches and parallel connection between branches. The inlet and outlet are disposed side-by-side on the same end face of the motor. The end rotary connection section has a deflection section along the radial direction.

2. The high-speed amorphous permanent magnet motor stator water-cooling device as described in claim 1, characterized in that, The stator core is made of amorphous alloy laminations; the stator teeth and the stator yoke are both located on the stator core.

3. The high-speed amorphous permanent magnet motor stator water-cooling device as described in claim 1, characterized in that, The cooling pipes are located at the radial center of the stator yoke and are evenly and symmetrically distributed along the circumference.

4. The high-speed amorphous permanent magnet motor stator water-cooling device as described in claim 1, characterized in that, The cooling pipe is sealed and connected to the water inlet and outlet located on the same side of the motor, forming a continuous cooling liquid flow channel.

5. The high-speed amorphous permanent magnet motor stator water-cooling device as described in claim 1, characterized in that, The cooling pipes are located in the yoke region above the teeth of the stator core; the through-pipe structure composed of series and parallel cooling pipes forms a cooling flow channel structure, the through-pipe structure includes multiple parallel branches, each of which consists of multiple cooling pipes connected in series in a U-shaped rotating section and finally flowing into the outlet.

6. The high-speed amorphous permanent magnet motor stator water-cooling device as described in claim 5, characterized in that, Each parallel branch is connected in series. After the cooling water enters through the inlet, it sequentially connects to the adjacent cooling pipes through the U-shaped rotary connecting section and is discharged from the outlet, forming a U-shaped series flow channel layout with water entering and exiting on the same side.

7. The high-speed amorphous permanent magnet motor stator water-cooling device as described in claim 1, characterized in that, The tube structure has a radial deflection section at the end, which is used to reduce the axial length of the cooling water flow and save space at the motor end.

8. The high-speed amorphous permanent magnet motor stator water-cooling device as described in claim 1, characterized in that, The outer diameter of the cooling pipe is set to 8mm to 12mm; the motor is a synchronous motor or an asynchronous motor, and the number of phases of the motor is set to 3 to 6.

9. A high-speed amorphous permanent magnet motor stator water-cooling device as described in claim 1, characterized in that, The cooling pipes are made of cupronickel, stainless steel or copper alloy.

10. A method of using a tube-type stator water-cooling device for a high-speed amorphous permanent magnet motor, comprising the tube-type stator water-cooling device for a high-speed amorphous permanent magnet motor as described in any one of claims 1-9, characterized in that... include: A tube-through structure is provided in the stator yoke of the motor. The circumferential position of the tube-through structure corresponds to the yoke area above the stator teeth, and the radial position is located in the radial middle area of ​​the stator yoke. Several cooling pipes are pre-embedded in the tube-through structure so that the cooling pipes are evenly distributed along the circumference of the stator yoke. Based on the power rating and heat load level of the motor, the number and diameter of the cooling pipes are selected. A series-parallel flow channel connection method is adopted to divide several cooling pipes into multiple parallel branches. The cooling pipes in each parallel branch are connected in series sequentially through the end rotary connection section to form a composite flow structure with series connection within the branch and parallel connection between branches. The inlet and outlet of the cooling pipe are arranged side by side on the same end face of the motor, and a deflection section is set in the radial direction at the end rotary connection section. Start the cooling system so that the cooling liquid enters from the inlet and flows through the series cooling pipes in each parallel branch in sequence, absorbing the heat generated by the stator yoke, stator teeth and winding coils, and is discharged from the outlet, forming a tube-type water cooling circulation for the stator core and windings. By adjusting the number of parallel branches, the diameter of the cooling water pipes, and the cooling water flow rate, the maximum temperature of the windings can be controlled below a set threshold, thereby achieving synergistic optimization of thermal management and electromagnetic performance during continuous motor operation.

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